Question

Liczbę zwiększ o 20%

Oblicz 130% liczby

Answer 1

√(25/16) *(4/25) + 1,2 *(25/9) =

= (5/4 )* (4/25)  +  (6/5)*(25/9 ) =

= (1/5) + (10/3) =

= (3/15) + (50/15) =

= 53/15

 

Obliczam licze o 20% większą od 53/15

 

53/15 + 0,2*53/15 =

=( 53/15) + (1/5)*(53/15) =

= (53/15) +( 53/75) =

= (265/75) + (53/75) =

= 318/75 =

= 106/25 =

= 4 i 6/25

= 4,24

 

Zad 2

 

√0,81 *(5/3)² - √(25/9) *(2/5)² =

= 0,9 *(25/9) -  (5/3)*(4/25) =

= (9/10)*(25/9) - ( 4/15) =

=  (5/2) - (4/15) =

= (75/30) - ( 8/30) =

= 67/30 =

= 2 i 7/30 =

= 2,2(3) 

 

Obliczam 130% z liczby 67/30

 

1,3 *67/30 =

= (13/10)*(67/30) =

= 871/300 =

= 2 i 271/300=

= 2,90(3)